Mixed Blue Stained Glass Cobbles-8 ounces(half pound) Cobbles are small pieces of beautiful Cathedral Stained Glass with the look and feel of translucent polished stones. Use them in mosaics, glass collage, wire wrapped jewelry and in floral arrangements Their unique sizes and shapes make craft projects fun and easy to do. The glass pieces range in size from 1/2-inch to 1-inch. The color mix includes various shades of blue.